Ventilator.



F. E. CRAMPTON.

VENTILATOR.

APPLICATION HLED net. 4. 1911.

1,298,671. Q Patented Apr. 1,1919.

Qwuewiioz FE Cramplon FRANK E. CRAMPTON, OF CLEVELAND, OHIO.

VENTILATOB.

T c all whom it may concern Be it known that I, FRANK E. dRAMQPTON,

a citizen of the United States, residing at Cleveland,.in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Ventilators, of which the following is a specification.

. This invention relates to ventilators of 7 the rotary type, and hasfor its main object to provide a ventilator, which will greatly increasethe velocity of air currents passing horizontally therethrough forproducing siphonic action, and thereby exhaust air through a, verticalpipe extendingfrom a building. 1 This is accomplished in two ways bymaking the horizontal air passage tapering toward its outlet and also byproviding pockets for directing a .part of this as will be readilyunderstood, the invention air within a cylindrical shell or. chamber.

With the above and other objects in view V will be hereinafter fullydescribed in connection with the accompanying drawings, which illustratea preferred embodiment of the same, and the novel features thereof willbe distinctly pointed out "in the appended claims.

In the different views of the drawings,

like characters of reference designate the same parts.

Figure 1 1s a sectional elevatlon of a ventilator constructed inaccordance with my invention,

Fig.2 is a rear end elevation, and

Fig. 3 is a front end view.

In the drawings, 1 represents a conical funnel arranged horizontally.Within the funnel is a cylindrical shell or chamber 2 of uniformdiameter, which is open at its rear end 3 and terminates short of thesmaller end of the funnel, while its other end terminates short of thelarger end of the funnel and is closed by a cone 4. Extending downwardlyfrom the cylindrical shell 2 is a neck 5,'which passes through anopening in the lower side of the funnel 1 and is fixed thereto in such aposition as to support said cylindrical shell in central spaced relationto the funnel. The neck 5 is rotatably mounted over the end of the pipe6, which extends through and is fixed to the roof of a building to beventilated. For rotatably thereby, an upright stationary shaft 7 isfixed at 8 to a bridge9, which is arranged Specification of LettersPatent.

Patented Apr. 1, 1919.

. Application filed October 4, 1917. Serial No. 194,641.

hired to the pipe 6 at 17 in which the shaft 7 is loosely mounted, serveto maintain the rotatable part of the ventilator in a vertical position.The usual vane 18 carried by the conical funnel 1 is employed forturning the ventilator.

. As the wind strikes the cone 4, it is directed outwardly to the largeror front end of the funnel 1, and as the funnel tapers around thecylindrical shell 2, the outlet is contracted, which causes the air toleave at a greater velocity than it entered. This produces siphonicaction at the open end 3 of the cylindrical shell 2 and naturallyexhausts air from the neck 5 and the pipe 6. To further increase thevelocity of the air for obtaining greater siphonic action, a pluralityof openings 19 are provided in the walls of the cylindrical shell 2, andthe openings are covered by inclined pockets 20 having open front ends21 and closed rear ends 22. As the air enters the open ends of thepockets, it is directed through the openings 19, and this producesincreased velocity of the air at the open end of the cylindrical shell.The openings are made tapering and larger toward their rear edges todeliver a greater volume of air nearer the open end 3 of the cylindricalshell 2, and thereby create greater siphonic action.

By constructing a ventilator as disclosed, the velocity of the aircurrents passing horizontally therethrough will be increased and thenfurther stimulated for producing siphonic action and thereby efiicientlyexhausting air through a vertical pipe for ventilating a building. Itwill be understood that slight changes in the design may be made withoutdeparting from the principle of the invention.

Having fully described my invention, what I claim is:

1. In a ventilator, a funnel, a shell arranged longitudinally within thefunnel in spaced relation thereto forming an air passage between thetwo, the shell havin a closed end, a neck extending from the shellthrongh the wall of the funnel for establishing communication from theoutside to the the openings for directing air from between the funneland the shell through the openings, substantially as described.

2. In a ventilator, a funnel, a shell arranged longitudinally within thefunnel in spaced relation thereto forming an air passage between thetwo, the shell having an open end and a closed end, the open end of theshell terminating short of the open end of the funnel, a neck extendingfrom the shell through the wall of the funnel for establishingcommunication from the outside to the inside of the shell, the wall ofthe shell being provided with openings near its open end, pocketscovering the openings, and the pockets having an open end for receivingair entering between the funnel and the closed end of the shell,substantially as described.

, 3. In a ventilator, a funnel, a shell arranged longitudinally withinthe funnel in spaced relation thereto forming an air passage between thetwo, the shell having an open end and a closed end, the open end of theshell terminating short of the open end of the funnel, a neck extendingfrom the shell through the wall of the funnel for establishingcommunication from the outside to the inside of the shell, the wall ofthe shell being provided with openings near its open end, the openingsbeing tapering and larger near the open end of the shell,pocketscovering said openings, the pockets being inclined from the innerside of the funnel to the outer side of the shell, and the larger endsof the pockets being open for receiving air entering between the funneland the closed end of the shell, substantially as described.

4:. In a ventilator, a conical funnel, a cylindrical shell arrangedlongitudinally within the funnel in spaced relation thereto forming anair passage between the two having a smaller outlet than inlet, thecylindrical shell having an open end and being closed at the inlet endof the funnel, the open end of the shell terminating short of the openend of the funnel, a neck extending from the cylindrical shell throughthe wall of the funnel for establishing communication from the outsideto the inside of the cylindrical shell, the wall of the cylindricalshell being provided with openings near its open end, pockets coveringthe openings, and the pockets having an open end for receiving airentering the inlet end of the funnel, substantially as described.

In testimony whereof I mix my signature.

FRANK E. CRAMPTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. 0.

